Mailbox storage limits in Outlook - Microsoft Support
Outlook accounts can have up to 100GB of storage per mailbox (Exchange Online mailbox storage limits). Administrators can reduce maximum mailbox sizes per user or globally, see: How to set Exchange Online mailbox sizes and limits in the Microsoft 365 environment for details .
Storage limits in Outlook.com - Microsoft Support
You get 15 GB of free Outlook.com email storage which is separate from your Microsoft cloud storage. You have 5 GB of free cloud storage with your Microsoft account shared across your files and photos in OneDrive, attachments in Outlook.com and your Microsoft 365 apps.
Microsoft storage - Microsoft Support
Select Email storage to expand the section and you will see a breakdown of how much space each folder in your mailbox is taking. The list of the folders shown includes an option to permanently delete all items (or those older than 3, 6, or …
Manage my mailbox size - Microsoft Support
Here are some ways to keep your mailbox size under control: Archive older items – Move old items you want to keep to an archive. You can create a separate Outlook Data File (.pst) that you can open from Outlook any time you need it.
Microsoft storage quotas - Microsoft Support
If you don't have a Microsoft 365 subscription, you get 15 GB of free mailbox storage for your Outlook.com emails, contacts and calendar items. You also get 5 GB of free cloud storage for your email attachments, files and photos in OneDrive.
Manage email storage with online archive mailboxes
An Outlook online archive mailbox can store older email messages where they won't occupy space in your primary mailbox. This specialized mailbox appears alongside your other mailbox folders in Outlook.
Microsoft storage FAQs - Microsoft Support
Mailbox storage. Your Outlook.com email storage quota includes the following: Emails associated with your Microsoft account (Outlook.com, Hotmail, Live or MSN).
Reduce the size of your mailbox and Outlook Data Files (.pst and …
If you use an Microsoft 365, Exchange, IMAP, or Outlook.com account, a copy of your mailbox is stored in an Offline Outlook Data File (.ost). To reduce the size of your Outlook Data File (.pst) or Offline Outlook Data File (.ost), you can manually compact the data file.
What’s the size of my mailbox? - Microsoft Support
You’ll see that the size for the mailbox and each subfolder is indicated in kilobytes (KB). To find the size in megabytes, move the decimal point over three places to the left. For example, 4742 KB is roughly 4.7 MB.
Changes to Microsoft 365 email features and storage
Starting November 30, 2023, Microsoft 365 Personal or Microsoft 365 Family subscribers will no longer be able to create a new email address for any personalized domain associated with their Outlook.com mailbox.